camouflage vs throw up smoke screen

camouflage

noun
  • A pattern on clothing consisting of irregularly shaped patches that are either greenish/brownish, brownish/whitish, or bluish/whitish, as used by ground combat forces. 

  • The use of natural or artificial material on personnel, objects, or tactical positions with the aim of confusing, misleading, or evading the enemy. 

  • The act of disguising. 

  • Resemblance of an organism to its surroundings for avoiding detection. 

  • A disguise or covering up. 

  • Clothes made from camouflage fabric, for concealment in combat or hunting. 

verb
  • To hide or disguise something by covering it up or changing the way it looks. 

throw up smoke screen

How often have the words camouflage and throw up smoke screen occurred in a corpus of books? (source: Google Ngram Viewer )